<template>
  <header class="header">
    <!-- 头部的第一行 -->
    <div class="top">
      <div class="container">
        <div class="loginList">
          <p>尚品汇欢迎您！</p>
          <p v-if="$store.state.user.userInfo.name">
            <a href="javascript:;">{{ $store.state.user.userInfo.name }}</a>
            <a href="javascript:;" class="register" @click="logout">退出登录</a>
          </p>
          <p v-else>
            <span>请</span>
            <!-- <a href="###">登录</a> -->
            <router-link to="/login">登录</router-link>
            <!-- <a href="###" class="register">免费注册</a> -->
            <router-link to="/register" class="register">免费注册</router-link>
          </p>
        </div>
        <div class="typeList">
          <router-link to="/center">我的订单</router-link>
          <!-- <a href="###">我的订单</a> -->
          <router-link to="/shopcart">我的购物车</router-link>
          <!-- <a href="###">我的购物车</a> -->
          <a href="###">我的尚品汇</a>
          <a href="###">尚品汇会员</a>
          <a href="###">企业采购</a>
          <a href="###">关注尚品汇</a>
          <a href="###">合作招商</a>
          <a href="###">商家后台</a>
        </div>
      </div>
    </div>
    <!--头部第二行 搜索区域-->
    <div class="bottom">
      <h1 class="logoArea">
        <router-link class="logo" title="尚品汇" to="/">
          <img src="./images/logo.png" alt="" />
        </router-link>
        <!-- <a class="logo" title="尚品汇" href="###" target="_blank">
        </a> -->
      </h1>
      <div class="searchArea">
        <form action="/***" class="searchForm">
          <!-- .trim 自动去除两边的空格 -->
          <input type="text" id="autocomplete" class="input-error input-xxlarge" v-model.trim="keyword" />
          <!-- .prevent 取消默认行为 -->
          <button class="sui-btn btn-xlarge btn-danger" @click.prevent="search">
            搜索
          </button>
        </form>
      </div>
    </div>
  </header>
</template>

<script>
export default {
  name: 'Header',
  data () {
    return {
      keyword: ''
    }
  },
  mounted () {
    // 在 Header 中绑定自定义事件监听,在回调中清除数据
    this.$bus.$on('removeKeyword', () => {
      this.keyword = ''
    })
  },
  // 在组件销毁之前解绑事件监听
  beforeDestroy () {
    this.$bus.off('removeKeyword')
  },
  methods: {
    search () {
      // 编程式路由跳转
      // this.$router.push(`/search/${this.keyword}`)

      const location = {
        // 路由必须配置 name
        name: 'search',
        // 将当前就有的 query 参数携带上
        query: this.$route.query
      }
      // 只有有数据时,才携带 params 参数
      if (this.keyword) {
        location.params = {
          keyword: this.keyword
        }
      }

      /*
        router.push(location, onComplete?, onAbort?)
        router.push(location).then(onComplete).catch(onAbort)
      */
      // 解决重复跳转路由错误
      // 方式一: 传入成功的回调函数
      // console.log(this.$router.push(location, () => { }))   // undefined
      // 方式二: catch 处理错误的 Promise
      // console.log(this.$router.push(location).catch(() => { }))  // Promise

      /*
         从其它页到搜索页 push()
         从搜索页到搜索页 replace()
       */
      if (this.$route.name === 'search') {
        this.$router.replace(location)
      } else {
        this.$router.push(location)
      }
    },
    async logout () {
      try {
        await this.$store.dispatch('reqUserLogout')
        alert('退出成功')
        this.$router.push('/')
      } catch (error) {
        alert(error.message)
      }
    }
  }
}
</script> 

<style lang="less" scoped>
.header {
  & > .top {
    background-color: #eaeaea;
    height: 30px;
    line-height: 30px;

    .container {
      width: 1200px;
      margin: 0 auto;
      overflow: hidden;

      .loginList {
        float: left;

        p {
          float: left;
          margin-right: 10px;

          .register {
            border-left: 1px solid #b3aeae;
            padding: 0 5px;
            margin-left: 5px;
          }
        }
      }

      .typeList {
        float: right;

        a {
          padding: 0 10px;

          & + a {
            border-left: 1px solid #b3aeae;
          }
        }
      }
    }
  }

  & > .bottom {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;

    .logoArea {
      float: left;

      .logo {
        img {
          width: 175px;
          margin: 25px 45px;
        }
      }
    }

    .searchArea {
      float: right;
      margin-top: 35px;

      .searchForm {
        overflow: hidden;

        input {
          box-sizing: border-box;
          width: 490px;
          height: 32px;
          padding: 0px 4px;
          border: 2px solid #ea4a36;
          float: left;

          &:focus {
            outline: none;
          }
        }

        button {
          height: 32px;
          width: 68px;
          background-color: #ea4a36;
          border: none;
          color: #fff;
          float: left;
          cursor: pointer;

          &:focus {
            outline: none;
          }
        }
      }
    }
  }
}
</style>
